Re-examine all that you have been told... dismiss that which insults your soul.
Walt Whitman
My blog: A Gamut of Interests
Don't overthink this first bike. It's easy to do, I certainly did it, but at your price range and being pretty new to the sport, just make sure you get a good fit and worry about the details later.
Once you are comfortable with your trail riding and the abilities of your bike, then you'll want to start thinking about details.
I have a Giant Rincon. I have no complaints. It's a sturdy, functional, perfectly useful bike.
Enjoy it, trust it, put some miles on it, have fun with it. It's a bike, they are supposed to be fun =)